The current identity and system of Gilas is predicated on size. Kai, JMF, Edu, etc importance isn't going away anytime soon.
I think what IPC is advocating for is the "ability" to field in a modern smallball/microball lineup when needed. If there are injured bigs or when were up against 5-out hot-shooting teams...we need to have 5 guys who can employ the OKC style defense (speed, wingspan, horizontal rim protection).
I've said before that our current identity (size, triangle, defense) matches up well with some world teams, but it won't match up well against some other teams. If we achieve the ability to do horizontal defense effectively, our chances of matching up better against more world-level teams goes up.